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http://www.w3.org/TR/html-markup/input.number.html#input.number make no mention of localisation issues. http://en.wikipedia.org/wiki/Decimal_mark * What happens if a user types 1,234 into a HTML5 number input? * Is <input type="number" value="1,234"> valid HTML? (Not at the moment, but should it be?)
Actually the relevant pieces are in the spec, but badly linked. Moved to https://github.com/w3c/html/issues/343